Parts display correctly in WAILA

Register an method that can be overidden

Register the same method in the interface

New class that picks the item and displays it to WAILA

Register the new class and call the other class method

Import in PartWailaDataProvider

Fixed errors

Renamed all Display -> Stack

Stuff

src/main/java/appeng/integration/modules/waila/part/BasePartWailaDataProvider.java

@@ -22,6 +22,7 @@ package appeng.integration.modules.waila.part;
 import java.util.List;
 
 import net.minecraft.entity.player.EntityPlayerMP;
+import net.minecraft.item.ItemStack;
 import net.minecraft.nbt.NBTTagCompound;
 import net.minecraft.tileentity.TileEntity;
 import net.minecraft.world.World;
@@ -41,6 +42,12 @@ import appeng.api.parts.IPart;
  */
 public abstract class BasePartWailaDataProvider implements IPartWailaDataProvider
 {
+	@Override
+	public ItemStack getWailaStack( IPart part, IWailaConfigHandler config, ItemStack partStack )
+	{
+		return null;
+	}
+
 	@Override
 	public List<String> getWailaHead( IPart part, List<String> currentToolTip, IWailaDataAccessor accessor, IWailaConfigHandler config )
 	{